EP 0509662 A1 19921021 - Resin composition for automobile bumper.
Title (en)
Resin composition for automobile bumper.
Title (de)
Harzzusammensetzung für Automobilstossstangen.
Title (fr)
Composition de résine pour pare-chocs d'automobile.
Publication
Application
Priority
JP 8985491 A 19910328
Abstract (en)
A resin composition for an automobile bumper comprising components (A), (B), and (C) described below: (A) 45 to 74% by weight of a crystalline ethylene-propylene block copolymer having (a) a flexural modulus of 15,000 kg/cm<2> or more, (b) an ethylene content of 5 to 20% by weight, (c) an intrinsic viscosity (decalin, 135 DEG C) of a portion soluble in p-xylene at room temperature of 3 or more, (d) a melt flow index (MI) of 21 to 70 g/10 min., and (e) a content of a portion insoluble in boiling n-heptane of 97% by weight or more; (B) 21 to 35% by weight of elastomer selected from the group consisting of components (I), (II) and (III) and having a weight ratio of (I) : [(I) + (II) + (III)] of from 0.5 to 1.0, (a) said component (1) being an amorphous ethylene-butene copolymer having a butene content of 10 to 25% by weight and a Mooney viscosity value, (ML1+4, 100 DEG C) of 5 to 20, (b) said component (II) being an amorphous ethylene-propylene copolymer having an ethylene content of 70 to 90% by weight and a Mooney viscosity value (ML1+4, 100 DEG C) of 5 to 40, and (c) said component (III) being a hydrogenated block copolymer consisting of 10 to 40% by weight of an aromatic vinyl polymer block X and 60 to 90% by weight of a conjugate diene polymer block Y, having a structure of said block components being X - Y or X - (Y - X)n, wherein n is 1 or 2, 90 mol% or more of said block Y being hydrogenated and the melt flow index (MI) of the hydrogenated block copolymer being 5 g/10 min. (230 DEG C, 2.16 kg) or more, and; (C) 5 to 10% by weight of talc having a combustion loss of 7% by weight or less, containing no particles having a diameter of 10 mu m or more and having an average particle diameter D50 of 1.0 to 3.0 mu m.
IPC 1-7
IPC 8 full level
C08K 3/34 (2006.01); B60R 19/03 (2006.01); C08L 23/08 (2006.01); C08L 23/16 (2006.01); C08L 53/00 (2006.01); C08L 53/02 (2006.01)
CPC (source: EP US)
B60R 19/03 (2013.01 - EP US); C08L 53/00 (2013.01 - EP US); C08L 23/0815 (2013.01 - EP US); C08L 23/16 (2013.01 - EP US); C08L 53/02 (2013.01 - EP US); C08L 2205/02 (2013.01 - EP US)
Citation (search report)
- [X] GB 2206886 A 19890118 - MITSUI PETROCHEMICAL IND, et al
- [A] GB 2176790 A 19870107 - NISSAN MOTOR
- [X] WORLD PATENTS INDEX LATEST Derwent Publications Ltd., London, GB; AN 89-119531 & JP-A-1 066 263 (CHISSO CORP) 13 March 1989
- [X] WORLD PATENTS INDEX LATEST Derwent Publications Ltd., London, GB; AN 90-207230 & JP-A-2 140 258 (UBE INDUSTRIES KK) 29 May 1990
- [X] PATENT ABSTRACTS OF JAPAN vol. 13, no. 510 (C-654)15 November 1989 & JP-A-1 204 946 ( NISSAN MOTOR CO LTD ) 17 August 1989
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0509662 A1 19921021; EP 0509662 B1 19951227; CA 2064286 A1 19920929; CA 2064286 C 20030923; DE 69207048 D1 19960208; DE 69207048 T2 19960515; ES 2081049 T3 19960216; JP 2902496 B2 19990607; JP H04300935 A 19921023; US 5532309 A 19960702
DOCDB simple family (application)
EP 92302737 A 19920327; CA 2064286 A 19920327; DE 69207048 T 19920327; ES 92302737 T 19920327; JP 8985491 A 19910328; US 26236594 A 19940620